Merge branch 'master' into ds/backfill

* master: (446 commits)
  The seventh batch
  The sixth batch
  The fifth batch
  The fourth batch
  refs/reftable: fix uninitialized memory access of `max_index`
  remote: announce removal of "branches/" and "remotes/"
  The third batch
  hash.h: drop unsafe_ function variants
  csum-file: introduce hashfile_checkpoint_init()
  t/helper/test-hash.c: use unsafe_hash_algo()
  csum-file.c: use unsafe_hash_algo()
  hash.h: introduce `unsafe_hash_algo()`
  csum-file.c: extract algop from hashfile_checksum_valid()
  csum-file: store the hash algorithm as a struct field
  t/helper/test-tool: implement sha1-unsafe helper
  trace2: prevent segfault on config collection with valueless true
  refs: fix creation of reflog entries for symrefs
  ci: wire up Visual Studio build with Meson
  ci: raise error when Meson generates warnings
  meson: fix compilation with Visual Studio
  ...

1 files changed, 16 insertions, 0 deletions

diff --git a/t/t3206-range-diff.sh b/t/t3206-range-diff.sh
index d2ca43d6aa..e091df6d01 100755
--- a/t/t3206-range-diff.sh
+++ b/t/t3206-range-diff.sh
@@ -908,4 +908,20 @@ test_expect_success 'submodule changes are shown irrespective of diff.submodule'
 	test_cmp expect actual
 '
 
+test_expect_success '--diff-merges' '
+	renamed_oid=$(git rev-parse --short renamed-file) &&
+	tree=$(git merge-tree unmodified renamed-file) &&
+	clean=$(git commit-tree -m merge -p unmodified -p renamed-file $tree) &&
+	clean_oid=$(git rev-parse --short $clean) &&
+	conflict=$(git commit-tree -m merge -p unmodified -p renamed-file^ $tree) &&
+	conflict_oid=$(git rev-parse --short $conflict) &&
+
+	git range-diff --diff-merges=1 $clean...$conflict >actual &&
+	cat >expect <<-EOF &&
+	1:  $renamed_oid < -:  ------- s/12/B/
+	2:  $clean_oid = 1:  $conflict_oid merge
+	EOF
+	test_cmp expect actual
+'
+
 test_done